Let's divide 88464443 by 399
The aim is to understand the frequency of 399 in 88464443.

On to step 1:
If we divide 8 by 399, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 399

Let's proceed to step 2:
88 divided by 399 is 0 with a remainder of 88.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 88 to get 88.
Append the next digit (4) from the dividend to 88 and continue with: 884 / 399

Advancing to step 3:
The number 399 fits into 884 2 times, leaving a remainder of 86.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 798 from 884 leaves us with 86.
Grab the next digit (6) from the dividend, add it to 86, then carry on: 866 / 399

Let's proceed to step 4:
When dividing 866 by 399, we get 2 with a remainder of 68.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
Subtract 798 from 866 to get 68.
Take the next digit (4) from the dividend and append it to 68, then repeat: 684 / 399

On to step 5:
The number 399 fits into 684 1 times, leaving a remainder of 285.
Write down 1 as next digit of the result. 
Result so far: 221.0
If we subtract 399 from 684, we get 285.
Include the next digit (4) from the dividend after 285, then repeat: 2854 / 399

On to step 6:
If we divide 2854 by 399, we get 7 and a remainder of 61.
Record the quotient 7 as the next digit in the result. 
Result so far: 2217.0
Subtracting 2793 from 2854 leaves us with 61.
Include the next digit (4) from the dividend after 61, then repeat: 614 / 399

Moving on to step 7:
614 divided by 399 is 1 with a remainder of 215.
Record the quotient 1 as the next digit in the result. 
Result so far: 22171.0
Subtract 399 from 614 to get 215.
Include the next digit (3) from the dividend after 215, then repeat: 2153 / 399

Going ahead to step 8:
2153 divided by 399 is 5 with a remainder of 158.
Use 5 as the next digit of our solution. 
Result so far: 221715.0
If we subtract 1995 from 2153, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Advancing to step 9:
When dividing 1580 by 399, we get 3 with a remainder of 383.
Put 3 as the next digit of the answer. 
Result so far: 221715.3
Subtract 1197 from 1580 to get 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

Going ahead to step 10:
399 can be fit into 3830 9 times, resulting in a remainder of 239.
The next digit of our result is 9. 
Result so far: 221715.39
If we subtract 3591 from 3830, we get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

On to step 11:
When dividing 2390 by 399, we get 5 with a remainder of 395.
The next digit of our result is 5. 
Result so far: 221715.395
Deduct 1995 from 2390 and we're left with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Advancing to step 12:
When dividing 3950 by 399, we get 9 with a remainder of 359.
Use 9 as the next digit of our solution. 
Result so far: 221715.3959
Deduct 3591 from 3950 and we're left with 359.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3590, and continue the process.

On to step 13:
When dividing 3590 by 399, we get 8 with a remainder of 398.
The number 8 becomes the next digit in our result. 
Result so far: 221715.39598
The remainder is 398 after subtracting 3192 from 3590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Moving on to step 14:
399 goes into 3980 9 times with a remainder of 389.
The number 9 becomes the next digit in our result. 
Result so far: 221715.395989
Deduct 3591 from 3980 and we're left with 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

On to step 15:
When dividing 3890 by 399, we get 9 with a remainder of 299.
Put 9 as the next digit of the answer. 
Result so far: 221715.3959899
The remainder is 299 after subtracting 3591 from 3890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

The quotient of the division is 221715.3959899, and the remainder is 2.99e-06.